package com.project.erp.common.utils;

/**
 * 
 * COPYRIGHT (C) 2013 BY XXX公司

 *  功能模块名：系统-工具类

 *  功能描述：将数字转换成英文

 * @author LiJiaGuo    

 * @version 1.0  

 * @created 2013-12-13 下午9:26:53
 */
public class ChangeNumberToEnUtils {
	//public static void main(String[] args) {   
        //System.out.println( ChangeNumberToEnZhUtils.changeToEn("8963697.34"));  
	//}
	
	public static String changeToEn(String x) {   
	    int z = x.indexOf("."); // 取小数点位置  
	    String lstr = "", rstr = "";  
	    if (z > -1) { // 看是否有小数，如果有，则分别取左边和右边  
	    	lstr = x.substring(0, z);  
	    	rstr = x.substring(z + 1);  
	     }else{ // 否则就是全部  
	    	 lstr = x;
	     }
	  
	    String lstrrev = reverse(lstr); // 对左边的字串取反  
	    String[] a = new String[5]; // 定义5个字串变量来存放解析出来的叁位一组的字串  
	  
	    switch (lstrrev.length() % 3) {   
	     	case 1 :  
	     		lstrrev += "00";  
	     		break;  
	     	case 2 :  
	     		lstrrev += "0";  
	     		break;  
	    }  
	    String lm = ""; // 用来存放转换後的整数部分  
	    for (int i = 0; i < lstrrev.length() / 3; i++) {   
	    	a[i] = reverse(lstrrev.substring(3 * i, 3 * i + 3)); // 截取第一个叁位  
	    	if (!a[i].equals("000")) { // 用来避免这种情况：1000000 = one million thousand only  
	    		if (i != 0){  
	    			lm = transThree(a[i]) + " " + parseMore(String.valueOf(i)) + " " + lm; // 加: thousand、million、billion  
	    		}else{  
	    			lm = transThree(a[i]); // 防止i=0时， 在多加两个空格.
	    		}
	    	}else{  
	    		lm += transThree(a[i]);
	    	}
	     }  
	  
	    String xs = ""; // 用来存放转换後小数部分  
	    if (z > -1){  
	    	xs = "AND CENTS " + transTwo(rstr) + " "; // 小数部分存在时转换小数  
	    }
	  
	    return lm.trim() + " " + xs + "ONLY";  
	}
	
	private static String parseFirst(String s) {   
	    String[] a =  new String[] { "", "ONE", "TWO", "THREE", "FOUR", "FIVE", "SIX", "SEVEN", "EIGHT", "NINE" };  
	    return a[Integer.parseInt(s.substring(s.length() - 1))];  
	}
	
	private static String parseTeen(String s) {   
		String[] a =  new String[] {"TEN","ELEVEN","TWELEVE","THIRTEEN","FOURTEEN","FIFTEEN","SIXTEEN","SEVENTEEN","EIGHTEEN","NINETEEN" };  
	    return a[Integer.parseInt(s) - 10];  
	}
	
	private static String parseTen(String s) {   
	    String[] a =  new String[] {"TEN","TWENTY","THIRTY","FORTY","FIFTY","SIXTY","SEVENTY","EIGHTY","NINETY" };  
	    return a[Integer.parseInt(s.substring(0, 1)) - 1];  
	}  
	
	private static String transTwo(String s) {   
	    String value = "";  
	    // 判断位数  
	    if (s.length() > 2){ 
	    	s = s.substring(0, 2);  
	    }else if (s.length() < 2){ 
	    	s = "0" + s; 
	    }
	  
	    if (s.startsWith("0")){ // 07 - seven 是否小於10  
	    	value = parseFirst(s);  
	    }else if (s.startsWith("1")){ // 17 seventeen 是否在10和20之间  
	    	value = parseTeen(s);
	    }else if (s.endsWith("0")){ // 是否在10与100之间的能被10整除的数  
	    	value = parseTen(s);
	    }else{  
	    	value = parseTen(s) + " " + parseFirst(s);  
	    }
	    return value;
	}
	
	private static String parseMore(String s) {   
	    String[] a = new String[] { "", "THOUSAND", "MILLION", "BILLION" };  
	    return a[Integer.parseInt(s)];  
	}
	
	private static String transThree(String s) {   
	    String value = "";  
	    if (s.startsWith("0")){ // 是否小於100  
	    	value = transTwo(s.substring(1));  
	    }else if (s.substring(1).equals("00")){ // 是否被100整除  
	    	value = parseFirst(s.substring(0, 1)) + " HUNDRED";  
	    }else{  
	    	value = parseFirst(s.substring(0, 1)) + " HUNDRED AND " + transTwo(s.substring(1)); 
	    }
	    return value;  
	}
	
	private static String reverse(String s) {   
	    char[] aChr = s.toCharArray();  
	    StringBuffer tmp = new StringBuffer();  
	    for (int i = aChr.length - 1; i >= 0; i--) {   
	    	tmp.append(aChr[i]);  
	    }  
	    return tmp.toString();  
	}
}
